[WCNCR00144638] regd: Fix local data base issues

[Description]
Fix chan flag is not exactly the same as new update regd rules.
Fix iwpriv set country supporting 4 ASCII country code.
Add check to prevent mixing using of iwpriv and NL80211 set country method.

Change-Id: If66e74fd839e6ed94a749061e485f8528a507cdd
Feature: regd
Signed-off-by: Chiahsuan Chuang <chiahsuan.chuang@mediatek.com>
CR-Id: WCNCR00144638
4 files changed